掺杂Y_(2)O_(3)钨基复合材料在近韧脆转变温区的静载拉伸特性  

Static Tensile Properties near Ductile-Brittle Transition Temperature Region of W-based Composites Doped with Y_(2)O_(3)

作　　者：黄俊[1,2,3,4] 李阳阳 袁国虎 左彤 罗来马[1,2,3,4] 徐光青[1,2,3] 吕珺[1,2,3] 谭晓月 洪雨[1,3] 朱晓勇[1,2,3,4] 吴玉程[1,2,3,4] HUANG Jun;LI Yangyang;YUAN Guohu;ZUO Tong;LUO Laima;XU Guangqing;LYU Jun;TAN Xiaoyue;HONG Yu;ZHU Xiaoyong;WU Yucheng(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei University of Technology,Hefei 230009,China;Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei University of Technology,Hefei 230009,China;International S&T Cooperation Base for Advanced Energy and Environmental Materials,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]合肥工业大学有色金属与加工技术国家地方联合工程研究中心,合肥230009 [3]合肥工业大学先进功能材料与器件安徽省重点实验室,合肥230009 [4]合肥工业大学先进能源与环境材料国际科技合作基地,合肥230009

出　　处：《机械工程材料》2023年第11期18-24,共7页Materials For Mechanical Engineering

基　　金：国家自然科学基金国际(地区)合作研究与交流项目(52020105014)。

摘　　要：制备了掺杂质量分数分别为0.5%,2.0%Y_(2)O_(3)的钨基复合材料,研究了其显微组织,通过不同温度(25~800℃)下的拉伸试验分析了其近韧脆转变温区的变形特性。结果表明:2种复合材料均存在由轧制变形导致的大量位错,Y_(2)O_(3)颗粒对位错运动起到钉扎作用;Y_(2)O_(3)掺杂质量分数为2.0%的复合材料的晶粒更细小,发生韧脆转变的温度更低,在300~400℃拉伸时发生半脆性行为,断口区域位错密度在3.8×10^(15)~3.9×10^(15)m^(-2),在600~800℃下发生明显塑性变形,位错密度增加至6.2×10^(15)~6.8×10^(15)m^(-2)。W-based composites doped with 0.5wt%and 2.0wt%Y_(2)O_(3)were prepared.The microstructure of the composites was investigated.The deformation characteristics near ductile-brittle transition temperature region of the composites were analyzed by tensile tests at different temperatures(25-800℃).The results show that the two composites had a large number of dislocations formed by rolling deformation,and Y_(2)O_(3)particles played a pinning role in dislocation motion.The composite containing 2.0wt%Y_(2)O_(3)had smaller grain size and a lower ductile-brittle transition temperature.The semi-brittle behavior of the composite containing 2.0wt%Y_(2)O_(3)occurred during tension at 300-400℃,and the dislocation density in the fracture area was between 3.8×10^(15)-3.9×10^(15) m^(-2);during tension at 600-800℃,plastic deformation occurred,and the dislocation density increased to 6.2×10^(15)-6.8×10^(15) m^(-2).

关 键 词：Y_(2)O_(3) 钨基复合材料 韧脆转变温度 显微组织 

分 类 号：TG146.4[一般工业技术—材料科学与工程]